The genus Hugueninia is a group of flowering plants in the family Acanthaceae that is native to Madagascar. There are no synonyms for this particular genus, but there are other closely related genera that share similar characteristics such as floral shape and leaf form. These include the genera Eberhardtia, Gendarussa, and Mendoncia. Hugueninia plants are known for their colorful, tubular flowers and evergreen leaves, making them a popular ornamental choice in gardens and landscapes. While there may not be synonyms for Hugueninia, it's important to note the diversity of related plants within the Acanthaceae family.